EP0137089A1 - Installation et procédé d'application contrôlée de liquides sur une nappe absorbante - Google Patents

Installation et procédé d'application contrôlée de liquides sur une nappe absorbante Download PDF

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Publication number
EP0137089A1
EP0137089A1 EP83810466A EP83810466A EP0137089A1 EP 0137089 A1 EP0137089 A1 EP 0137089A1 EP 83810466 A EP83810466 A EP 83810466A EP 83810466 A EP83810466 A EP 83810466A EP 0137089 A1 EP0137089 A1 EP 0137089A1
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EP
European Patent Office
Prior art keywords
roller
liquor
web
material web
application roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83810466A
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German (de)
English (en)
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EP0137089B1 (fr
Inventor
Hans Bors
Peter Egger
Albert Götz
Martin Dr. Schwemmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Triatex International AG fueur Textile Forschung und Entwicklung
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Triatex International AG fueur Textile Forschung und Entwicklung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Triatex International AG fueur Textile Forschung und Entwicklung filed Critical Triatex International AG fueur Textile Forschung und Entwicklung
Priority to AT83810466T priority Critical patent/ATE35830T1/de
Priority to DE8383810466T priority patent/DE3377422D1/de
Priority to EP83810466A priority patent/EP0137089B1/fr
Priority to US06/657,900 priority patent/US4672705A/en
Publication of EP0137089A1 publication Critical patent/EP0137089A1/fr
Application granted granted Critical
Publication of EP0137089B1 publication Critical patent/EP0137089B1/fr
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/10—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material
    • D06B1/14—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material with a roller

Definitions

  • the invention relates to a device and a method for applying regulated amounts of liquor to a liquid-absorbent material web such as textile or paper.
  • MA minimum order.
  • the invention relates to certain fleets which are particularly suitable for carrying out the method.
  • the MA process and the MA machines allow the continuous application of relatively concentrated solutions or dispersions of finishing or treatment agents, which are to be distributed homogeneously in the textile goods, at very high working speeds.
  • the quantities of liquor applied no longer exceed the quantities required for effect formation, as was the case, for example, on Foulard is the case.
  • the above-mentioned MA method leads to considerable energy savings or permits an increased capacity of the drying units.
  • reagents that crosslink cellulose there is a surprising, increased effect.
  • finishing agents expressed as the 100% active amount per unit area (or unit of space) of textile goods, better finishing effects or. unchanged finishing effects result in improved abrasion resistance and a substantial saving in finishing agent.
  • the MA process is characterized by the particular simplicity of the devices, the very uniform application and the high working speeds.
  • foam stability, foam composition and the regulation of the application also pose major procedural problems.
  • the MA process is particularly suitable for the continuous, homogeneous finishing of cellulose-containing material webs, ie those which consist entirely or predominantly of cellulose fibers, by means of reactive finishing agents.
  • cellulose-containing material webs ie those which consist entirely or predominantly of cellulose fibers
  • reactive finishing agents In the first place you have the ver Drive developed for applying reactant resins with subsequent condensation on dry or practically dry textile goods. Any other liquors containing reactive substances for cellulose can of course also be applied continuously and in a controlled manner in the manner indicated.
  • the MA devices allow smooth processing of smooth textile webs. If there are creases and other folds, e.g. Flat folds in the original textile fabric result in non-uniformities when applying the fleet, which have hardly any adverse effects on the mere finishing, because they are invisible and only cover small areas. Things are different if the fleet contains optical components such as brighteners or dyes. In this case, the appearance is impaired, this impairment being exacerbated by the non-uniformity of a high-level finishing applied at the same time.
  • the invention seeks to remedy this; the device to be developed should be such that any desired fleet order, be it a minimum order or not, is continuously, regulated and uniform on any absorbent web material can be carried out without unevenness of the railway also leading to unevenness of the fleet order.
  • Such bumps are folds, knots, seams, nubs, etc.
  • a bound goods guide for the textile goods in that a steel roller 6, which is relieved by counterweight 9 or springs, is arranged a few angular degrees (angle p) in front of the normal run-up line of a textile web 4 on an application roller 1 and above it, such as it shows Fig. 1 schematically.
  • the rubber layer is indicated by dashed lines and with la be draws.
  • the textile web 4 is pulled over a deflection roller 5 over the applicator roller 1.
  • the counterweight 9 and its lever arm are chosen so that an optimal relief of the guide roller 6 is achieved.
  • the line of contact of the guide roller 6 with the application roller 1 - the axes of both rollers run parallel - is set up in such a way that it lies at an angle ⁇ of a few degrees from the normal line of contact 10 which the web 4 'would form with the application roller 1 if the guide roller 6 would not be present.
  • bound goods management just used is borrowed from the technique of mercerization, where it is often used. He wants to express that the goods do not run freely, but are "supported” when they are handed over to another machine element, usually another roller.
  • the expression does not mean that the goods are opened to the fleet that is brought up, because a tangential introduction of the web into the nip of two rollers can also be described as bound goods guidance.
  • Application roller is understood to mean an application roller which, in contrast to the so-called platen roller, is not coupled to the material web running over it and to be provided with liquor in the sense of an equal speed of material web and roller surface. That means that the application roller usually has a controllable surface speed that is independent of the material speed.
  • the application roller serves as an actuator in a regulating or control arrangement.
  • the rubber application roller is easily mechanically vulnerable, so that the liquor film is not perfect. Cleaning the rubber application roller is very difficult because of its microporosity.
  • an application roller with a metal surface preferably with a specific, defined surface quality
  • a counter roller with a resilient, non-slip surface which can absorb unevenness of the web
  • a new class of treatment fleets has now been developed, which is the subject of a further independent patent claim.
  • the aqueous liquors usually contain special surfactants; they are characterized by meeting the film formation test described below.
  • the inventive is in the context of. agreed to see fleet properties with the fact of using an application roller with metal surface; Existing fleets can also be used if they meet the film formation test.
  • the application roller consists of such a metal, at least on its surface, which takes on a very smooth surface structure after some time when the process is carried out due to the polishing action of the textile material.
  • a preferred material is stainless steel;
  • the roller surface is band-ground to roughness class N5 according to VSM 10230/31.
  • the counter roll must be arranged in such a way that the material web in the nip or shortly before it comes into contact with the fleet film, i.e. the web is open to the fleet and at the same time is in bound guidance, i.e. is supported by the backing roller at the rear.
  • the flexibility as a rule rubber elasticity, means that Counter roller the nip between this counter roller and the application roller can be set smaller than the average thickness of the web. It could not be expected that the material web would not be exposed to unacceptable tensions and distortions at high working speeds and with the lead that is normally used compared to the application roller. It was even to be expected that the train would be torn to Z.
  • the thickness of the nip is less than the average thickness of the material web; this means that the counter roll is mostly flattened in the nip, at least when the web is not or not sufficiently compressible.
  • the thickness of the nip is preferably 60 to 80% of the average thickness of the web. This average thickness is determined according to SNV 98411 (corresponds to DIN 53855 and ASTM D 1777-64).
  • the . Counter roll has a resilient surface.
  • this consists of a thick coating of nitrile rubber with a Shore hardness of about 35. Softer qualities can also be used.
  • the counter roller can also be a brush roller with bristles placed very densely, a sponge rubber or plastic foam roller, a felt, velvet roller, a cup roller, a suction roller, etc. It is important that the surface is non-slip against the material web.
  • the setting of the fixed distance of the counter roller from the application roller can be done manually or done by means of electromechanical, hydraulic or pneumatic means.
  • a simultaneous display of the thickness of the roll gap is advantageous. Since it occurs relatively frequently, is that the thickness of the web material, apart from a few bumps that are received by the counter roll to M ASA enter the passage of the web changes, one can expediently provide for an automatic adjustment of the nip. This is all the more easily possible since the basis weight of the web is measured anyway before the treatment liquor is applied; normally you will combine this measuring device with a thickness measuring device or set up and evaluate a function of the thickness depending on the basis weight.
  • a target value can then be specified for the thickness of the roll gap (for example 75% of the web thickness), which is then maintained by a motor by means of control devices known per se.
  • At least two doctor blades are expediently applied to the application roller.
  • the first doctor blade lies on the surface area between the discharge point of the material web and the immersion in the liquor and serves to remove dirt and any remaining film.
  • the doctor blade is discarded or returned to the fleet after cleaning.
  • the second squeegee lies below the liquid level in the liquor trough and is used to remove residual foam bubbles and to control the flow of the liquor on the surface of the roll.
  • the counter roller Since the counter roller is no longer springy hung, can be dispensed with the guide roller 5 compared to the originally tried device (Fig. 1).
  • the counter roll can be free-running or driven.
  • the counter roll should be driven for thin, light web and knitted fabrics as well as at high working speeds.
  • the porous web 4 runs over the rubber counter-roller 6, is brought into a convex configuration and is opened towards the liquor film F, which is brought up by the application roller 1. At the moment of contact, the fleet film F can better enter its open cavities H. As a result of the high speeds and the described relative speed between the application roller and the material web, the film is broken up into droplets, which improves its absorption.
  • the liquor-containing web 4 is compressed in the nip of the rollers 1 and 6 with elastic deformation of both the counter roller 6 and the web 4.
  • the previous opening of material is reversed and the web is redirected to a slightly concave configuration. This creates all the mechanical-physical requirements so that the fleet is the same can distribute moderately in the material web. Due to the pressure on the material, the liquid contained therein is brought into intensive contact with the material structure. There is also a slight opening of the web to the rear, which exerts a suction effect on the fleet.
  • this third phase in which the web 4 still remains in contact with the application roller 1, the absorption and distribution of the liquor can be completed, insofar as this is necessary because the compression of the web is released.
  • This further contact can be expressed as a center angle (for example ⁇ 1 , FIG. 2) of the application roller, in the form of a length (circumferential distance) or as a dwell time.
  • the latter value is particularly meaningful since the distribution of the fleet is a time function.
  • the contact angle is chosen to be approximately 2 to 15 °, corresponding to a length of approx. 6 to 40 cm on the roll surface and a dwell time of 0.0.2 to 0.2 sec.
  • the liquor has time, completely beforehand from the roll 1 into web 4, and the web can be lifted directly without further contact with roller 1 (arrow I in FIG. 3c).
  • the size of the contact angle can be used to regulate web braking.
  • the fleet uptake by the railways is from Ver ratio of the affinities of the fleet to the material web 4 and the surface of the application roller 1 dependent.
  • the normally remaining film boundary layer of the fleet will be reduced when, as usually according to the invention is the case, the web faster loading 'moves than the surface of application roll 1. This relative movement, a regular cleaning and smoothing the application roll is achieved.
  • a particular problem is the application of treatment liquor according to the MA process for knitwear. It is known that, due to the special, open structure of this textile product, difficulties arise when it is transported through treatment machines. When a tensile stress acting in the longitudinal direction is applied, the goods contract in the transverse direction. The fabric edges have a very strong tendency to curl up, with curl angles of over 360 ° being observed, in particular when the tubular knitted fabric is cut open.
  • the treatment in the described device is possible, also at high working speeds, provided that the knitted fabric web is acted upon at its edges on the counter-roller itself with flowing air which is inflated from suitably shaped air nozzles.
  • the material web Prior to this, in particular before passing through the first device for measuring the basis weight, the material web is expediently guided over a slatted roller which serves for centering and spreading; the path between the basis weight measuring device and the counter roller runs through a flat, new air stripper. Further preferred devices will then be described.
  • the present invention developed using a metal, such as steel roller application opens up new possibilities of purposeful V experienced improvement.
  • Such rollers are normally built as hollow rollers for the purpose of saving weight, and when using a hollow shaft, it is very easy to thermostate the roller by passing an appropriately tempered flow medium, whereby the film quality, the liquor concentration and other liquor properties including the evaporation rate can be precisely controlled. This was the case with the thermally poorly conductive, in the.
  • the application roller previously used with a thick rubber coating is of course not possible. Only by using a metal roller with a very smooth, non-porous surface as an application roller is a compression of the web material possible because the surface friction with the web is acceptably low given the speed difference between the web and the roller surface. Finally, such a roller can be easily cleaned and kept clean.
  • the invention further relates to a method for applying treatment agent to a liquid-absorbent web and a treatment liquor.
  • These subjects of the invention are defined in independent claims 15 and 25.
  • the web material is fed in and out and transported through the machine in a manner known per se.
  • the inventive method which is defined in claim 15, is not limited to the application of reactive finishing agents to cellulose-containing textile goods. You can use it with any, even non-aqueous fleets of any composition apply to any absorbent and flexible web material for the purpose of homogeneous distribution or more or less one-sided treatment.
  • the web material does not need to be hydrophilic, but must be able to absorb liquids.
  • the fleets only have to pass the film test defined below and should generally also pass the foam test also listed.
  • textile webs are initially considered, that is, fabrics, knitwear and non-wovens made from the known textile fibers, for example native and regenerated cellulose, wool, synthetic fibers such as polyester, polyolefins, polyacrylic fibers, polyvinyl chloride, polyamides, glass and asbestos and other mineral fibers such as rock and slag wool. It can also be natural or synthetic paper and thin cardboard. Sheets of yarns running in parallel (e.g. warp threads) that can touch one another laterally and possibly also have two or more layers are also possible. The material can also be moist, but must not be so wet that the saturation value in the nip is exceeded during compression.
  • the application to the fleet generally leads to a homogeneous distribution in the web material.
  • a one-sided applied liquor forms a homogeneous liquor distribution that penetrates the substrate.
  • the invention is not restricted to this effect.
  • Another very interesting possibility to use the new device is the wet-on-wet technique or the controlled addition order.
  • this technology saves one drying stage. It is assumed that the web is still moist, such as that which leaves a foulard after dyeing, and is provided with small, controlled amounts of another liquor in the device according to the invention. To do this, you can either apply a constant amount, eg 10 g / m or 20 g / m, or you can add the "missing" up to a certain target value for the total liquor, ie the dye liquor and the second liquor.
  • the device according to the invention can be used to apply so much liquor that the optimum value of the migration is obtained during the subsequent drying, and therefore dyed fabrics are obtained in a particularly indifferent and cost-effective manner.
  • This technique is referred to by the applicant as a "controlled high order".
  • an irregular order for example in the case of crepe formation in the web material or an effect dyeing.
  • these effects are achieved by disturbing the film guided on the application roller.
  • the disorder should preferably be random, i.e. without recognizable uniformity. This can be achieved by means of a squeegee which is moved back and forth by means of a motor on the fleet film of the application roller at an uncontrolled variable speed or by pulse, by irregular blowing on the film etc.
  • the method according to Invention works on several drying devices. Since the amount of liquor introduced into the web material is very small and essentially only fills the micropores of the substrate, there is no danger that fleet bags will form when the caulets are chewed and left to stand, as is observed with padded goods. In general, therefore, provision is made for intermediate rolling up and subsequent drying in suitably selected and set dryers if the current drying capacity is exceeded.
  • the device according to the invention can currently work at working speeds of 170 m / min and more, which the dryers cannot always follow despite the small amounts of water to be evaporated. The device should normally work on at least two dryers.
  • Fig. 2 shows the basic structure of the application device of the new machine.
  • the application roller 1 rotates in the trough 3, which contains the treatment liquor 2.
  • the roller 1 is made of steel (see below in connection with Fig. 5);
  • the foam scraper blade 14, which additionally serves to calm the flow in the trough, is pressed against it below the fleet level. It frees the application roller from air bubbles that can stick to its surface when immersed in the fleet.
  • the squeegee consists of a rubber or plastic strip with a Y profile, the arms of which are thickened at the ends and whose vertical web is clamped in a metal rail. This is now brought so close to the roller that the Y-arms line up and spread. This ensures that the doctor blade functions effectively and metal damage to the roller is reliably avoided.
  • a second doctor blade 16 on the discharge side of the application roller removes any liquor residues and dirt particles that come from the atmosphere or from the treated substrate. This excess liquor can be returned to the trough after cleaning.
  • a side doctor blade (not shown) is provided on both sides of the material web, which keeps the free edges of the application roller free of liquor.
  • These doctor blades are expediently designed to be automatically laterally displaceable, which can be achieved by optical sensors (not shown) and corresponding servo devices so that they follow the lateral displacements of the material web.
  • the gap S between the application roller and the counter-roller can be adjusted using adjusting means, which are symbolized by the arrows 18.
  • the incoming material web 4 first wraps around the counter roller 6 and, along the surface line 19, which, viewed in the web running direction, lies in front of the connecting plane E of the axes of the two rollers 1 and 6, comes into first contact with the liquor film and the application roller; the surface of the application roller is left again in the surface line 19a.
  • the distance between the two surface lines 19 and 19a represents the wrapping of the application roller; this distance is about 6 to 40 cm corresponding to an angle ⁇ 1 of 2 to 15 ° depending on the roller diameter; the residence time should be 0.02 to 0.2 sec, generally approx. 0.1 sec.
  • the route is mainly based on the permissible braking of the material web through the surface of the application roller 1.
  • the roller 1 is driven in a rotationally locking manner, ie it is braked if necessary and rotates at a constant, albeit controllable speed, usually with a lower surface speed v than the transport speed v of the material web.
  • the two speeds are related to each other by values that are in the range from 1:10 to 1: 0.5 and are usually approx. 1: 2.
  • the value v T generally ranges from 20 to 200 m / min, depending on the substrate.
  • the angle ⁇ 1 also depends on the absolute value of v T.
  • the web 4 wraps around the counter-roller 6 over a part of its circumference which, expressed as a central angle, is 60 to 120 °. Usually the web 4 is fed from above, as shown in Fig. 2, and the said angle is approximately 100 °.
  • the application roller 1 is first freed of residues by the doctor blade 16 and plunges cleanly into fleet 2.
  • the submerged squeegee 14 removes any attached bubbles.
  • the roller surface emerging from the liquor 2 carries a uniform liquor film, the thickness of which depends on the roller speed, the composition of the liquor and its (temperature-dependent) toughness and surface tension.
  • the doctor blade 16 is directed against the running direction of the roller 1.
  • a first possibility is to remove the web at an angle increasing to the horizontal (for example web 4 "in FIG. 2), ie to reduce the angle ⁇ 1 to almost zero if necessary.
  • Another possibility is the partial lifting of the counter roller from the application roller in order to enlarge the gap width S within the permissible limits, this option being preferred because of its technically simpler realization and better suitability for automation.
  • roller gap S should generally not be more than about 80% of the average material thickness of the web, because otherwise the condition of bound goods guidance when the first contact with the liquor film is no longer guaranteed.
  • the setting of the nip S happens with means not shown here, for example, known per se, an eccentric whose operating handle preferably is provided with a scale at which the ize of the roll gap can be read immediately.
  • Fig. 4 now shows, also schematically, in side view a device complete down to the details according to the teaching of the invention.
  • the machine consists of three main parts, namely the feed group 20, the order group 21 and the winding group 22.
  • the web material for example a textile fabric, is unwound from a supply roll, not shown.
  • the material 4 initially runs in the direction of the arrow between or over a number of semi-circularly arranged calming rollers 24, on which existing material tensions balance out, the goods are spread out and pressed-in folds smooth out.
  • the web runs downwards in the frame 20a of the feed group 20 and then passes the web guiding and centering device 26, which is laterally displaceable and in which the web is constantly regulated in its lateral guidance in such a way that its edge always ends up on the same circular line of the application roller accumulates.
  • the regulation comes about in a manner known per se by the fact that the web goods are supplied by sensors, not shown, e.g. Light barriers, monitored and the deviation signal is given to the control drive of the guide device, not shown.
  • the guiding device is e.g. manufactured by Erhardt & Leimer KG in Augsburg (Germany).
  • the material web After passing through deflection rollers 28, the material web arrives in the nip of the conveying device 30 which, together with the winding to be described later, ensures that the tension in the web is always constant in the fleet application.
  • the actuator of the control loop is the unloaded feeler roller 32, via which the web 4 is guided after leaving the conveying device 30. It then touches a direction roller 34 and then penetrates the free space between the transmitter and receiver of the non-contact basis weight measurement group 36.
  • measurement groups have been known for quite a long time and therefore do not need to be described in more detail; they work on the basis of radiation absorption.
  • the weight per unit area of the untreated web is determined in measuring group 36.
  • the material web which has smeared and picked up the film of the treatment liquor offered by the application roller 1 is deflected vertically upwards by a first deflection roller 38 and by two further deflection rollers 38 ', 38 "in the direction of the winding-up group 22.
  • the material web containing the treatment liquor passes the second basis weight measuring group 40, which works exactly like the first measuring group 36 and together with it generates a quotient or difference signal which serves to control the applied amount of liquor in a known manner, which is not part of the invention; it becomes to DT-OS 2 114 517, P. 16.
  • the speed of the application roller is changed under otherwise the same conditions.
  • the winding group 22 consists of a very schematically indicated, winding roll 41 and a guide arm 42 which is articulated on the machine stand 22a and acts on the roll roll 41 to be formed from above.
  • a guide roller 44 and a storage roller 46 run in the guide arm 42, which is provided twice, and is driven in the direction of the arrow by a winding motor (not shown) at a constant and controllable speed.
  • the web 4 wraps around the roller 46 to at least 180 and forms the roll 41 by laying it down. As the diameter of this roll increases, the pair of arms 42 moves upward.
  • the arrangement described has the advantage that the tension in the web 4 is always the same and that a very uniform roll 41 is formed.
  • Finished rolls 41 are suspended and fed to the dryer.
  • Automatic changers which are known to the person skilled in the art, are used to change the winding. They are not shown; their description can be omitted.
  • the winding of the moist web of material loaded with the treatment liquor described has the advantage that the subsequent drying can be carried out at any speeds adapted to the dryer or the tenter frame; in the event of faults in the dryer, the liquor application can still continue and vice versa.
  • FIG. 5 shows a longitudinal section of an application roller 1 used with advantage.
  • This initially has an inner hollow cylinder 100, which is connected in both end regions to hollow stub axles 103 via two annular disks 101, 102.
  • the outer cylinder 104 made of special steel, which is shrunk on and has a wall thickness of, for example, 3 to 5 mm.
  • the outer cylinder 104 is connected to the stub shaft by welding by means of a cover plate 104, which rests on the outside of the respective outer ring plate 102.
  • the surface area of the outer cylinder 104 is ground to a roughness N5 of VSM 10230/31.
  • the outer cylinder 104 projects beyond the inner cylinder 100 and the cover plates 105 on both sides, for example by 12 to 15 mm each. This avoids that at medium and high roller speeds, liquor from the trough reaches the cylinder jacket via the disks 105 or is thrown off the end faces or at least forms beads from excess liquor. This construction is preferred according to the invention.
  • Heating or cooling flow medium can be supplied and discharged through the hollow shafts 103. It is also possible to heat the roller electrically or with gas. The same applies to the fleet in the trough, i.e. the latter or the supply or circulation lines of the fleet, intermediate containers, etc. can be used as energy transmitters to regulate the fleet temperature.
  • Typical dimensions of these application rollers are almost any length and 150 to 350 mm in diameter.
  • Fig. 6 shows schematically in section a system according to the invention for the double-sided application of treatment liquors, which can be identical or different; only the order group is shown (see FIG. 4).
  • the machine has two application devices according to the invention in the frame 21.
  • the material web 4 enters the machine at the bottom and is deflected three times by three rollers 28. These rollers 28 can be free-running or driven.
  • the goods pass the first non-contact basis weight measuring group 36, which measures the weight of the dry, untreated goods. Now follows the first application device with liquor trough 3, application roller 1, counter roller 6 and deflection roller 38, which is mirror-invertedly identical to the corresponding device in FIG. 4; the detailed description given there should not be repeated here.
  • the web now passes through the second non-contact measuring group 40; the quotient signal of the measuring groups 40 and 36 is a measure of the amount of liquor applied.
  • the material web is fed to the second application group, which, as can be seen, acts on the other side of the material web and in turn consists of a fleet trough 3', application roller 1 ', counter roller 6' and deflection roller 38 '".
  • the web 4 which is now acted upon from two sides, leaves the machine at the top and can be deflected and wound up as desired. Before that, it passes through the third non-contact basis weight measurement group 48; the second or the entire fleet order can be determined by forming the quotient of the measured values with that of the measuring groups 40 and / or 36. They serve in a manner known per se Measurement signals for controlling the drives of the rollers 1 and 1 'for regulating the order quantities.
  • the dye solution or dispersion which contains the reactive dye and, if appropriate, conventional additives such as urea and wetting agent, but does not contain any alkali or alkali donor, is applied in an amount of 30-50%, based on the weight per unit area of the dry fabric.
  • the alkali-free application with controlled application ensures stable treatment liquors and allows a constant dye application, even with very substantive systems, without edge or end drain.
  • the alkali required for dye fixation if necessary together with salts and surfactants, is then applied in liquor quantities of 15 - 30% based on the weight per unit area of the dry fabric, the setting of the alkali concentration can be taken into account regardless of the The stability of the dye liquor can be adjusted so that maximum dye fixation is possible. Since the total amount of liquor applied by the two application devices remains below the values which result from conventional padding with an alkali-containing liquor, the best conditions result for optimum dye fixation. In addition, you usually get by with less dye. ' .
  • the dwell stage and the subsequent washing are carried out in a manner known per se.
  • the fabric is rolled up and packed in plastic film, dwelled in a conventional manner for 16 hours at room temperature and then rinsed, acidified, soaped, rinsed again and dried.
  • Fig. 7 shows schematically in section a machine for fleet application on very sensitive or delicate web materials such as tissue paper, but especially knitwear. A persistent curling of the web edges occurs with this material. In addition, significant tensile forces lead to the retraction of the web and non-uniformity of the forces to oblique distortion.
  • the goods to be treated are wound on the supply roll 50, which is provided with a regulated center drive (not shown). Via a driven deflecting roller 52, the web 4 passes under a dancer roller 54 and a group of small, curved guide rollers 56 into a plate air stripper 58.
  • the dancer roller 54 generates a signal for controlling the (not depicted) on the roll 50.
  • the air stripper 58 acts on both sides and directed air inflation on the knitted fabric web 4 such that it emerges from the stripper 58 smoothly, without creases and with only a few rolled edges. The angle of this stripper can be adjusted using the swiveling support 60.
  • the knitted fabric web is fed to a slatted roller 62 which is driven and on which centering and further spreading of the fabric web is achieved.
  • the slatted roller 62 and the air Ausstreifer 58 are known, commercially available products from Erhardt & Leimer KG, Augsburg, Federal Republic of Germany. The construction and mode of operation of these devices are known or accessible to the person skilled in the art.
  • the centered web first passes through a device 65 for non-contact basis weight measurement and then through a second air stripper 66, which is designed like the first stripper 58, to the counter-roller 6, which is driven. It has been observed that there is a residual tendency for the edges to curl in the web. In order to eliminate this residual tendency, according to a special embodiment of the invention, air is blown up by separate edge roll-out nozzles 68, which are located at the ends of air channels 67 and act on both sides of the web on the edge region thereof, and shortly before entering the rollers. .spalt S, and it was found that these measures ensure a completely smooth emergence of the web onto the application roller 1.
  • the fleet trough is again designated with 3.
  • the liquor After the liquor has been applied to the material web, it is passed through the second device 70 for contactless basis weight measurement and then fed to the rewinder.
  • the required deflection rollers 38 and 38 "are also driven.
  • the winding of the damp, impregnated knitwear is advantageously carried out according to the principle of bound goods management.
  • the winding tube 72 is provided with a center drive, not shown, which is not a function of the output signal provided donor is controllable.
  • a counter-roller 78 is pressed against this sleeve 72 with the aid of a hydraulic or pneumatic drive 74 via an articulated arm 76, which roller guides the web 4 in the manner shown at the moment of rolling up.
  • the described special measures ensure that the fleet is evenly applied, e.g. Small order, on the most delicate material, especially knitwear, with high working speeds, namely up to 200 m / min, which was previously considered absolutely impossible.
  • the devices shown can additionally contain the known cord rollers for smoothing the web and for spreading wrinkles.
  • Fig. 8 shows schematically the extremely preferred assembly of the counter roller 6. This assembly allows a precise and identical setting of the roller gap S and a parallel guided rapid lifting of the counter roller, for example when approaching a strong thickening in the web. This can prevent tears.
  • This suspension of the counter-roller 6 initially consists of a bearing block 80 located on both sides of the roller, in which the axis 82 of the roller 6 is mounted and which can move vertically between two guide blocks 81.
  • the displacement is guided by a piston rod 83, which is connected to a piston 85 movable in a cylinder 84.
  • a line 86 opens below and another line 87 above the piston 85.
  • a throttle valve 88 can be attached, which brakes the flow medium.
  • the cylinder 84 is articulated on a two-armed lever 89, the other end 90 of which is provided with a bore with an internal thread.
  • a threaded spindle 91 engages therein, which carries an adjusting disk 93 outside its bearing housing 92.
  • the threaded spindle -91 can be connected to a servo drive, not shown.
  • line 86 When the device is operating, line 86 is depressurized and there is pneumatic (or hydraulic) pressure in line 87. As a result, the piston 85 is pressed against the inner projection 94 of the lower end face of the cylinder.
  • the exact thickness of the nip S is now set by turning the adjusting disk 93 accordingly (with scale division) and always remains the same.
  • the pressure prevailing in cylinder 84 acts like a spring; the roller 6 can thus deflect upwards if it is necessary before a web of material breaks.
  • pressure is applied to the line 86 and the line 87 is vented, and the piston 85 and the roller 6 go up immediately, but in a movement damped by the throttle 88. After lowering again, the previously selected value S for the thickness of the roll gap is restored.
  • Fig. 9 shows schematically a further preferred embodiment of the device according to the invention, which is particularly well suited for use with very wrinkled material with stubborn folds.
  • the material web 4 is guided essentially from above onto a group of sheet rollers 98, 98a, 99.
  • the sheet rollers 98 and 98a are used to initially smooth the material and in some cases are unnecessary. It is important that the counter roller 99 is designed as a curved roller.
  • Sheet rolling i.e. curved spreader rolls are known per se (see M. Peter, Fundamentals of Textile Finishing, 10th Edition, 1970, p. 48) and are e.g. supplied by Stove-Woodward Inc., (Mass., U.S.A.). They represent a curved cylinder. Preference is given to those arc rolls whose curvature is adjustable (by pressure on the axis).
  • the curved rollers 98, 98a and 99 are adjusted with their curvature in such directions R that the material web is spread out (and not drawn in).
  • the last (or only) sheet roller 99 is provided with the features of the counter roller defined and described above. Because the axis of the roller 99 does not run parallel to the axis of the application roller 1 everywhere, it is not possible to precisely define a roller gap between the rollers 99 and 1. However, such an approach is approximately achieved and the desired bound product guidance is sufficiently achieved in practice by gradually approaching the roller 99 during the operation of the roller 1 and also selecting the direction R as parallel as possible to the tangent to the roller 1 in the roller gap.
  • the device shown in Fig. 9 allows a uniform application of liquor on web material with very permanent folds, which are smoothed at the moment of the application of the liquor.
  • a 115 cm wide fabric made of 65% polyester and 35% cotton, weight 105 g / m 2 , average thickness approx. 0.21 mm, is highly refined and at the same time brightened optically.
  • a simple application roller with a diameter of 300 mm was used as the application member (cf. DE-PS 21 l4 517).
  • the equipment received was stained in the area of the selvedges.
  • the application roller is a steel roller with a diameter of 300 mm.
  • the counter roll (Fig. 2, Fig. 8) has a diameter of 200 mm and is made of soft rubber of Shore hardness 35A.
  • the nip S is set to 0.15 mm (70% of the average thickness of the fabric).
  • the finishing achieved (dry layer approx. 8.5% by weight, based on dry starting fabric) is homogeneous and spotless, i.e. uniform.
  • the described subject matter of the invention may vary within the scope of the claim. be modified. So it is e.g. possible to drive or brake the individual guide rollers of the device as required (which is also a drive).
  • the rollers can have a shape different from the cylindrical shape.
  • the rollers 38 can be perforated vacuum rollers for even better fleet distribution or for special cases. If necessary, rollers and other guide elements, measuring devices etc. can be added.
  • the web of material can be steamed or put under vacuum for better absorption of the liquor (expulsion of air) before and / or after touching the application roller.
  • Other pre-treatment and / or post-treatment of the material web familiar to the person skilled in the art can also be carried out in the course of the method.
  • the invention can be used to apply foamed liquors.
  • foamed liquors must be free of vagrant liquids.
  • Foam formation must be checked because wetting liquors that pass the film formation test described above tend to foam. However, this must not exceed a certain level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP83810466A 1983-10-07 1983-10-07 Installation et procédé d'application contrôlée de liquides sur une nappe absorbante Expired EP0137089B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT83810466T ATE35830T1 (de) 1983-10-07 1983-10-07 Vorrichtung und verfahren zum aufbringen geregelter mengen an flotte auf eine aufnahmefaehige materialbahn.
DE8383810466T DE3377422D1 (en) 1983-10-07 1983-10-07 Device and process for applying metered bath quantities on an absorptive material web
EP83810466A EP0137089B1 (fr) 1983-10-07 1983-10-07 Installation et procédé d'application contrôlée de liquides sur une nappe absorbante
US06/657,900 US4672705A (en) 1983-10-07 1984-10-05 Process for applying controlled amounts of liquids to a receptive material web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83810466A EP0137089B1 (fr) 1983-10-07 1983-10-07 Installation et procédé d'application contrôlée de liquides sur une nappe absorbante

Publications (2)

Publication Number Publication Date
EP0137089A1 true EP0137089A1 (fr) 1985-04-17
EP0137089B1 EP0137089B1 (fr) 1988-07-20

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US (1) US4672705A (fr)
EP (1) EP0137089B1 (fr)
AT (1) ATE35830T1 (fr)
DE (1) DE3377422D1 (fr)

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EP0290703A1 (fr) * 1987-04-16 1988-11-17 Triatex International Ag Procédé permettant d'apporter des liquides de traitement sur des matières textiles en bandes
US4844105A (en) * 1988-10-24 1989-07-04 Silicon Technology, Inc. Spray treatment apparatus for coke oven door structures
WO1993005223A1 (fr) * 1991-09-11 1993-03-18 Jagenberg Aktiengesellschaft Dispositif pour enduire une bande de matiere, notamment une bande de papier ou de carton, guidee autour d'un contre-cylindre
WO2014195184A1 (fr) * 2013-06-04 2014-12-11 A. Monforts Textilmaschinen Gmbh & Co. Kg Dispositif d'enduction et/ou imprégnation d'une bande continue de matériau textile
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Publication number Priority date Publication date Assignee Title
EP0290703A1 (fr) * 1987-04-16 1988-11-17 Triatex International Ag Procédé permettant d'apporter des liquides de traitement sur des matières textiles en bandes
US4844105A (en) * 1988-10-24 1989-07-04 Silicon Technology, Inc. Spray treatment apparatus for coke oven door structures
WO1993005223A1 (fr) * 1991-09-11 1993-03-18 Jagenberg Aktiengesellschaft Dispositif pour enduire une bande de matiere, notamment une bande de papier ou de carton, guidee autour d'un contre-cylindre
WO2014195184A1 (fr) * 2013-06-04 2014-12-11 A. Monforts Textilmaschinen Gmbh & Co. Kg Dispositif d'enduction et/ou imprégnation d'une bande continue de matériau textile
WO2020254202A1 (fr) 2019-06-19 2020-12-24 A. Monforts Textilmaschinen Gmbh & Co. Kg Dispositif et procédé pour le traitement continu d'un produit plat

Also Published As

Publication number Publication date
ATE35830T1 (de) 1988-08-15
EP0137089B1 (fr) 1988-07-20
DE3377422D1 (en) 1988-08-25
US4672705A (en) 1987-06-16

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